Exception for Logistic function from Lakshay Garg

• unused variable y

Math

\[\frac{2}{1 + e^{-2 \cdot x}} - 1\]

C

double f(double x, double __attribute__((unused)) y) {
        double r8120 = 2.0;
        double r8121 = 1.0;
        double r8122 = -2.0;
        double r8123 = x;
        double r8124 = r8122 * r8123;
        double r8125 = exp(r8124);
        double r8126 = r8121 + r8125;
        double r8127 = r8120 / r8126;
        double r8128 = r8127 - r8121;
        return r8128;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (x y)
  :name "Logistic function from Lakshay Garg"
  (- (/ 2.0 (+ 1.0 (exp (* -2.0 x)))) 1.0))

Backtrace

get-representation: Unknown representation #f		L	C
loop	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	122	4
prepare-points	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	146	0
setup-prog!34	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	67	0
run-improve43	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	339	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28